This is such a sad case. After reading through some of the news articles back in 1971, I have to agree with those who think they had some sort of accident or met with foul play.
A couple of things about 1971:
If you were a couple with husband working and mom staying at home, you usually did your grocery shopping on Friday night after your husband came home from work with his paycheck. For some couples, that might mean there isn't a lot of food at home on Thursday night.
Fast food restaurants like McDonalds were not too common and would not have stayed open past 10 pm
There were no restaurants or grocery or convenience stores that stayed open late at night. Really, not even gas stations. One place that would be open very late at night back then would be a truck stop. My guess is they didn't have a lot of food at home and the husband needed a lunch for the next day, so they went to pick up sandwiches and coffee at the truck stop. I'm guessing someone needed a pack of cigarettes, too.
If they had money saved up, it was probably to buy a house or car. If they were excited about the prospect of buying a home, they would have mentioned this to other family members.
They just don't sound like the kind of people to be involved in anything nefarious and 1971 Corbin, KY was probably not the kind of place where there were a lot of drugs or other illegal activities happening.
Perhaps. The suburban town I lived in didn't have much more than marijuana back then and it was a good sized metro area. The people dealing it were hippies and college students. Young people.
Regardless, there's absolutely nothing about this couple to indicate they were involved in that kind of activity. They don't look the type - not the same lifestyle (working mechanic with stay at home wife and 3 kids?), lived in a trailer court off a busy commercial highway, not the same appearance, car, past times, etc. In 1971 no hippie would buy a bag of grass from this couple. They would have thought they were undercover police. No way.
Nothing was revealed after their disappearance either. I feel bad when innocent people go missing like this and strangers make up a lot of defamatory stories about what sordid activities they might have been involved in. They're not around to defend themselves.
Everything you mentioned about 1971 is true. My parents are from rural Eastern Kentucky. I also remember how things were back then when traveling with my parents to the rural areas of Kentucky in 1971.
Back in 1971, a lot of the small towns in rural areas of Kentucky had stores that were open until 6:00 p.m. and were closed on Sundays.
Grocery stores were usually open until 8:00 or 9:00 p.m. in the evening. You had to go to a drug store or pharmacy if you needed a prescription to be filled. Grocery stores did not fill your prescriptions back then.
Banks were usually open until 3:00 p.m. weekdays, but on Fridays were open until 6:00 p.m. and were open until noon on Saturdays, but were closed on Sundays. Bank ATM's did not exist at all back then.
National chain fast food restaurants did not exist in many of the small towns in the rural areas of Kentucky back then. Most small towns only had local mom and pop restaurants.
Gas stations were open until about 8:00 p.m. in the evening and some were closed on Sundays.
I agree with the thinking that the Shelton parents either had an accident or were victims of foul play.
I believe there are two possible reasons why Martha Sue Shelton left her purse at home.
The first reason is that Martha Sue Shelton was rushed when she left home and she simply forgot her purse.
The second reason is that she felt that she didn't need to take her purse with her and was going somewhere that was nearby their home.
If an accident was involved, it's possible that their vehicle could have left the roadway during foggy conditions, or they could have been forced off the roadway.
It also possible that they went to pick up sandwiches at a truck stop or perhaps at an all night roadside diner, but never made it there.
Another possiblity is rather than being involved in illicit activities of any kind, they were lured or coerced to go somewhere which they didn't have any choice about the time and meeting location, and they became victims of foul play.
If foul play is involved, it's possible that someone knew they had money.
I don't know what it could have been that lured or coerced them into leaving their home during the middle of the night, but whatever it is, it cannot be good at all.